1 //===-- Writer.cpp - Library for Printing VM assembly files ------*- C++ -*--=//
3 // This library implements the functionality defined in llvm/Assembly/Writer.h
5 // This library uses the Analysis library to figure out offsets for
6 // variables in the method tables...
8 // TODO: print out the type name instead of the full type if a particular type
9 // is in the symbol table...
11 //===----------------------------------------------------------------------===//
13 #include "llvm/Assembly/Writer.h"
14 #include "llvm/Analysis/SlotCalculator.h"
15 #include "llvm/Module.h"
16 #include "llvm/Method.h"
17 #include "llvm/GlobalVariable.h"
18 #include "llvm/BasicBlock.h"
19 #include "llvm/ConstPoolVals.h"
20 #include "llvm/iOther.h"
21 #include "llvm/iMemory.h"
22 #include "llvm/Support/STLExtras.h"
23 #include "llvm/SymbolTable.h"
26 void DebugValue(const Value *V) {
30 // WriteAsOperand - Write the name of the specified value out to the specified
31 // ostream. This can be useful when you just want to print int %reg126, not the
32 // whole instruction that generated it.
34 ostream &WriteAsOperand(ostream &Out, const Value *V, bool PrintType,
35 bool PrintName, SlotCalculator *Table) {
37 Out << " " << V->getType();
39 if (PrintName && V->hasName()) {
40 Out << " %" << V->getName();
42 if (const ConstPoolVal *CPV = V->castConstant()) {
43 Out << " " << CPV->getStrValue();
47 Slot = Table->getValSlot(V);
49 if (const Type *Ty = V->castType()) {
50 return Out << " " << Ty;
51 } else if (const MethodArgument *MA = V->castMethodArgument()) {
52 Table = new SlotCalculator(MA->getParent(), true);
53 } else if (const Instruction *I = V->castInstruction()) {
54 Table = new SlotCalculator(I->getParent()->getParent(), true);
55 } else if (const BasicBlock *BB = V->castBasicBlock()) {
56 Table = new SlotCalculator(BB->getParent(), true);
57 } else if (const Method *Meth = V->castMethod()) {
58 Table = new SlotCalculator(Meth, true);
59 } else if (const Module *Mod = V->castModule()) {
60 Table = new SlotCalculator(Mod, true);
62 return Out << "BAD VALUE TYPE!";
64 Slot = Table->getValSlot(V);
67 if (Slot >= 0) Out << " %" << Slot;
69 Out << "<badref>"; // Not embeded into a location?
77 class AssemblyWriter {
79 SlotCalculator &Table;
81 inline AssemblyWriter(ostream &o, SlotCalculator &Tab) : Out(o), Table(Tab) {
84 inline void write(const Module *M) { processModule(M); }
85 inline void write(const GlobalVariable *G) { processGlobal(G); }
86 inline void write(const Method *M) { processMethod(M); }
87 inline void write(const BasicBlock *BB) { processBasicBlock(BB); }
88 inline void write(const Instruction *I) { processInstruction(I); }
89 inline void write(const ConstPoolVal *CPV) { processConstant(CPV); }
92 void processModule(const Module *M);
93 void processSymbolTable(const SymbolTable &ST);
94 void processConstant(const ConstPoolVal *CPV);
95 void processGlobal(const GlobalVariable *GV);
96 void processMethod(const Method *M);
97 void processMethodArgument(const MethodArgument *MA);
98 void processBasicBlock(const BasicBlock *BB);
99 void processInstruction(const Instruction *I);
101 void writeOperand(const Value *Op, bool PrintType, bool PrintName = true);
105 void AssemblyWriter::writeOperand(const Value *Operand, bool PrintType,
107 WriteAsOperand(Out, Operand, PrintType, PrintName, &Table);
111 void AssemblyWriter::processModule(const Module *M) {
112 // Loop over the symbol table, emitting all named constants...
113 if (M->hasSymbolTable())
114 processSymbolTable(*M->getSymbolTable());
116 for_each(M->gbegin(), M->gend(),
117 bind_obj(this, &AssemblyWriter::processGlobal));
119 Out << "implementation\n";
121 // Output all of the methods...
122 for_each(M->begin(), M->end(), bind_obj(this,&AssemblyWriter::processMethod));
125 void AssemblyWriter::processGlobal(const GlobalVariable *GV) {
127 if (GV->hasName()) Out << "%" << GV->getName() << " = ";
128 Out << GV->getType()->getDescription() << endl;
132 // processSymbolTable - Run through symbol table looking for named constants
133 // if a named constant is found, emit it's declaration...
135 void AssemblyWriter::processSymbolTable(const SymbolTable &ST) {
136 for (SymbolTable::const_iterator TI = ST.begin(); TI != ST.end(); ++TI) {
137 SymbolTable::type_const_iterator I = ST.type_begin(TI->first);
138 SymbolTable::type_const_iterator End = ST.type_end(TI->first);
140 for (; I != End; ++I) {
141 const Value *V = I->second;
142 if (const ConstPoolVal *CPV = V->castConstant()) {
143 processConstant(CPV);
144 } else if (const Type *Ty = V->castType()) {
145 Out << "\t%" << I->first << " = type " << Ty->getDescription() << endl;
152 // processConstant - Print out a constant pool entry...
154 void AssemblyWriter::processConstant(const ConstPoolVal *CPV) {
155 // Don't print out unnamed constants, they will be inlined
156 if (!CPV->hasName()) return;
159 Out << "\t%" << CPV->getName() << " = ";
161 // Print out the constant type...
162 Out << CPV->getType();
164 // Write the value out now...
165 writeOperand(CPV, false, false);
167 if (!CPV->hasName() && CPV->getType() != Type::VoidTy) {
168 int Slot = Table.getValSlot(CPV); // Print out the def slot taken...
169 Out << "\t\t; <" << CPV->getType() << ">:";
170 if (Slot >= 0) Out << Slot;
171 else Out << "<badref>";
177 // processMethod - Process all aspects of a method.
179 void AssemblyWriter::processMethod(const Method *M) {
180 // Print out the return type and name...
181 Out << "\n" << (M->isExternal() ? "declare " : "")
182 << M->getReturnType() << " \"" << M->getName() << "\"(";
183 Table.incorporateMethod(M);
185 // Loop over the arguments, processing them...
186 for_each(M->getArgumentList().begin(), M->getArgumentList().end(),
187 bind_obj(this, &AssemblyWriter::processMethodArgument));
190 // Finish printing arguments...
191 const MethodType *MT = (const MethodType*)M->getType();
192 if (MT->isVarArg()) {
193 if (MT->getParamTypes().size()) Out << ", ";
194 Out << "..."; // Output varargs portion of signature!
198 if (!M->isExternal()) {
199 // Loop over the symbol table, emitting all named constants...
200 if (M->hasSymbolTable())
201 processSymbolTable(*M->getSymbolTable());
205 // Output all of its basic blocks... for the method
206 for_each(M->begin(), M->end(),
207 bind_obj(this, &AssemblyWriter::processBasicBlock));
215 // processMethodArgument - This member is called for every argument that
216 // is passed into the method. Simply print it out
218 void AssemblyWriter::processMethodArgument(const MethodArgument *Arg) {
219 // Insert commas as we go... the first arg doesn't get a comma
220 if (Arg != Arg->getParent()->getArgumentList().front()) Out << ", ";
223 Out << Arg->getType();
225 // Output name, if available...
227 Out << " %" << Arg->getName();
228 else if (Table.getValSlot(Arg) < 0)
232 // processBasicBlock - This member is called for each basic block in a methd.
234 void AssemblyWriter::processBasicBlock(const BasicBlock *BB) {
235 if (BB->hasName()) { // Print out the label if it exists...
236 Out << "\n" << BB->getName() << ":";
238 int Slot = Table.getValSlot(BB);
239 Out << "\n; <label>:";
241 Out << Slot; // Extra newline seperates out label's
245 Out << "\t\t\t\t\t;[#uses=" << BB->use_size() << "]\n"; // Output # uses
247 // Output all of the instructions in the basic block...
248 for_each(BB->begin(), BB->end(),
249 bind_obj(this, &AssemblyWriter::processInstruction));
252 // processInstruction - This member is called for each Instruction in a methd.
254 void AssemblyWriter::processInstruction(const Instruction *I) {
257 // Print out name if it exists...
258 if (I && I->hasName())
259 Out << "%" << I->getName() << " = ";
261 // Print out the opcode...
262 Out << I->getOpcodeName();
264 // Print out the type of the operands...
265 const Value *Operand = I->getNumOperands() ? I->getOperand(0) : 0;
267 // Special case conditional branches to swizzle the condition out to the front
268 if (I->getOpcode() == Instruction::Br && I->getNumOperands() > 1) {
269 writeOperand(I->getOperand(2), true);
271 writeOperand(Operand, true);
273 writeOperand(I->getOperand(1), true);
275 } else if (I->getOpcode() == Instruction::Switch) {
276 // Special case switch statement to get formatting nice and correct...
277 writeOperand(Operand , true); Out << ",";
278 writeOperand(I->getOperand(1), true); Out << " [";
280 for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; op += 2) {
282 writeOperand(I->getOperand(op ), true); Out << ",";
283 writeOperand(I->getOperand(op+1), true);
286 } else if (I->isPHINode()) {
287 Out << " " << Operand->getType();
289 Out << " ["; writeOperand(Operand, false); Out << ",";
290 writeOperand(I->getOperand(1), false); Out << " ]";
291 for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; op += 2) {
293 writeOperand(I->getOperand(op ), false); Out << ",";
294 writeOperand(I->getOperand(op+1), false); Out << " ]";
296 } else if (I->getOpcode() == Instruction::Ret && !Operand) {
298 } else if (I->getOpcode() == Instruction::Call) {
299 writeOperand(Operand, true);
301 if (I->getNumOperands() > 1) writeOperand(I->getOperand(1), true);
302 for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; ++op) {
304 writeOperand(I->getOperand(op), true);
308 } else if (I->getOpcode() == Instruction::Malloc ||
309 I->getOpcode() == Instruction::Alloca) {
310 Out << " " << ((const PointerType*)I->getType())->getValueType();
311 if (I->getNumOperands()) {
313 writeOperand(I->getOperand(0), true);
315 } else if (I->getOpcode() == Instruction::Cast) {
316 writeOperand(Operand, true);
317 Out << " to " << I->getType();
318 } else if (Operand) { // Print the normal way...
320 // PrintAllTypes - Instructions who have operands of all the same type
321 // omit the type from all but the first operand. If the instruction has
322 // different type operands (for example br), then they are all printed.
323 bool PrintAllTypes = false;
324 const Type *TheType = Operand->getType();
326 for (unsigned i = 1, E = I->getNumOperands(); i != E; ++i) {
327 Operand = I->getOperand(i);
328 if (Operand->getType() != TheType) {
329 PrintAllTypes = true; // We have differing types! Print them all!
335 Out << " " << I->getOperand(0)->getType();
337 for (unsigned i = 0, E = I->getNumOperands(); i != E; ++i) {
339 writeOperand(I->getOperand(i), PrintAllTypes);
343 // Print a little comment after the instruction indicating which slot it
346 if (I->getType() != Type::VoidTy) {
347 Out << "\t\t; <" << I->getType() << ">";
350 int Slot = Table.getValSlot(I); // Print out the def slot taken...
351 if (Slot >= 0) Out << ":" << Slot;
352 else Out << ":<badref>";
354 Out << "\t[#uses=" << I->use_size() << "]"; // Output # uses
360 //===----------------------------------------------------------------------===//
361 // External Interface declarations
362 //===----------------------------------------------------------------------===//
366 void WriteToAssembly(const Module *M, ostream &o) {
367 if (M == 0) { o << "<null> module\n"; return; }
368 SlotCalculator SlotTable(M, true);
369 AssemblyWriter W(o, SlotTable);
374 void WriteToAssembly(const GlobalVariable *G, ostream &o) {
375 if (G == 0) { o << "<null> global variable\n"; return; }
376 SlotCalculator SlotTable(G->getParent(), true);
377 AssemblyWriter W(o, SlotTable);
381 void WriteToAssembly(const Method *M, ostream &o) {
382 if (M == 0) { o << "<null> method\n"; return; }
383 SlotCalculator SlotTable(M->getParent(), true);
384 AssemblyWriter W(o, SlotTable);
390 void WriteToAssembly(const BasicBlock *BB, ostream &o) {
391 if (BB == 0) { o << "<null> basic block\n"; return; }
393 SlotCalculator SlotTable(BB->getParent(), true);
394 AssemblyWriter W(o, SlotTable);
399 void WriteToAssembly(const ConstPoolVal *CPV, ostream &o) {
400 if (CPV == 0) { o << "<null> constant pool value\n"; return; }
401 WriteAsOperand(o, CPV, true, true, 0);
404 void WriteToAssembly(const Instruction *I, ostream &o) {
405 if (I == 0) { o << "<null> instruction\n"; return; }
407 SlotCalculator SlotTable(I->getParent() ? I->getParent()->getParent() : 0,
409 AssemblyWriter W(o, SlotTable);